Hello Yamaheart.
I commend your efforts with the cable management. It looks as if you put a lot of time into the project. It really looks good. One thing I discovered during my pursuit of perfect cable management was the challenge of complete separation of the power cords and the audio/video cables. Being that initially, the power centers were stacked beside the AVR (prior to the addition of the power amp), which made the separation literally impossible. It wasn't until I positioned the power centers on each audio rack on the bottom shelves, I was able to separate the power cords and cables.
I notice your use of the cable ties. I used those also but changed to velcro strips. The velcro allows easier negotiation when modifications are necessary.
So I do understand and appreciate your efforts. Great job!
Regards.